A mounting system (10) is provided with a plurality of one-side controllers and one or more two-side controllers in a serial configuration. This yields a more compact configuration with respect to the depth direction than with a mounting processing system in which one-side controllers are disposed back-to-back and are provided in a parallel configuration. Since the mounting system (10) is provided with one or more of the two-side controllers, a user must dispose one or more of the two-side controllers on a first side (1) and on a second side (2). However, the one-side controller has a normal flow printer (20) in which a control unit is disposed on the first side (1) and a reverse flow printer (40) in which a control unit is disposed on the second side (2); therefore, the workload of the user can be optimally carried out on the first side (1) and the second side (2).
